Look at the map. Which ecosystems show where early civilizations developed because the area allowed people to grow crops even during times with little rainfall? Select all that apply.

-Desert

-RainForest

-Savanna

-sahel

None of the ecosystems mentioned

Explanation:

As we know all the early civilizations were succesfully developed along rivers, like the Nile in Egypt, Euphrates and Tigris in Mesopotamia, the Ganges and Indus river in India and the Yangtze and yellow river in China

a big wall across the mexican border so no drugs, terrorist, or illegal immigrants can come through : )    

d and a is the correct anwsers

explanation: